CAJ | 학술논문

极化电流行波方向继电器利用电流初始行波的高频分量信息和电压行波的工频分量信息构成保护判据，突破了传统电容式电压互感器(CVT)不能有效传变高频电压信号的瓶颈，实现了行波极性比较式方向保护，并成功投入在超、特高压输电线路运行。但在含有串联补偿电容的输电线路中，串补电容的存在将对行波的传播特性产生一定影响。对极化电流行波方向继电器在串补线路应用中所存在的问题进行了分析，通过研究 CVT 的频率特性，对其算法进行了改进。仿真结果表明，该改进算法在串补线路中具有正确的动作特性，且在各种不同故障下都有良好的动作性能。
겁화전류행파방향계전기이용전류초시행파적고빈분량신식화전압행파적공빈분량신식구성보호판거，돌파료전통전용식전압호감기(CVT)불능유효전변고빈전압신호적병경，실현료행파겁성비교식방향보호，병성공투입재초、특고압수전선로운행。단재함유천련보상전용적수전선로중，천보전용적존재장대행파적전파특성산생일정영향。대겁화전류행파방향계전기재천보선로응용중소존재적문제진행료분석，통과연구 CVT 적빈솔특성，대기산법진행료개진。방진결과표명，해개진산법재천보선로중구유정학적동작특성，차재각충불동고장하도유량호적동작성능。
The polarized current travelling wave based directional relay (PCTDR) utilizing high frequency component of initial current wave and power frequency component of voltage performs effectively in transmission line protection.This relay,which has been successfully implemented in extra-high voltage(EHV)/ultra-high voltage(UHV)transmission lines,can overcome the high frequency transmission limitations of the capacitor voltage transformer (CVT).However,the series capacitor has a significant impact on the travelling wave propagation characteristic in series compensated lines.In this regard,the application problems of PCTDR in series compensated lines are firstly analyzed.Moreover,an improved PCTDR algorithm is proposed based on an investigation of the frequency response of CVT.Further,extensive simulation results have shown that the improved algorithm has a good performance in series compensated lines and is well adaptive in various fault conditions.